God exists in every element – This is the beginning of sadhana and also the end.
Sadhana begins with–  “Jibe samman dibe jani krishna adhishthan.”
Meaning – “We must respect every living being since Krishna dwells in each and every one.”  – (C.C.)  

And sadhana ends in –  “jahan jahan netra pode tahan krishna sphure.” 
Meaning – “Krishna reveals Himself wherever we glance.” – (C.C.)  

All Shastras have repeatedly mentioned this fact. It is impossible to obtain God if we are not aware that “God exists in every element.”
“sarva-bhuta-sthitang yo mang bhajaty-ekatvam-asthitah, sarvatha vartamano’pi sa yogi mayi vartate.” 
Meaning – “The devotee who is equal towards all, and forsaking all differences, adores Me – the One Who dwells in every element – he always resides in Me.” (Sri Gita 6.31) 

“yo mam pashyati sarvatra sarvam cha mayi pashyati,
tasyaham na pranashyami sa cha me na pranashyati.” 
Meaning – “The one who sees Me in every element and sees every element in Me, we continuously gaze upon each other.”  (Sri Gita 6.30)  

There is no existence other than God.
He is the cause and He is the ingredient of every element.
He is present in all living beings as the Witness. 
“maya tatam-idang sarvang jagad-vyakta-murtina.” 
Meaning – “I am present throughout Creation as the Unmanifested.” – (Sri Gita)  

“vistarah sarva-bhutasya vishnur-vishwam-idang jagat,
drashtavyam-atmavat tasmad-bhedena vichakshanayih.
sarvatra daityah samatam-upeta samatwam-aradhanam-achyutasya.”
Meaning- “O Daityas! All Creation is the expansion of Vishnu. Therefore, we must consider everybody as our own. This sort of perception is ‘God adoration’.”  – (Vishnu Puran)  

Having embarked in bhajan, if we are not aware that “God exists in every element”, we shall mete out differential treatment to others. This will lead to envy and violence. We shall lose concentration in bhajan. When we envy someone we envy Sri Bhagavan; for is not everyone within Him? And is He not within all? This means we are worshiping and envying the same Person! Sriman-Mahaprabhu has said – “Forget hurting a Vaishnav, the lowly man who hurts any being, adores Vishnu and tortures His subject, His worship is in vain and he eventually dies miserably. He is not aware that Vishnu exists in every element. This means, he thinks Vishnu is a material being! It is as if he massages a Brahmin’s feet with one hand and bangs a stone on his head with the other one.”  – (Sri Chaitanya Bhagabat)  

So, let us realize that He exists in every element. If we do not respect each and every soul,
we are hurting Him Whom we are worshiping. This sort of bhajan is futile. Srimad-Bhagavatam too says –  “I dwell in every being as the Witness. The one who ignores Me, thus situated (in all beings), and worships Me in various forms such as Deity, is embarrassing.
If you ignore Me –as situated in all elements – the Witness and Controller of every being – and worship Me in various forms such as Deity, you are only pouring ghee in ashes.
If you disregard living beings and worship Me, albeit with many ingredients, I am not pleased.
So it is your duty to be aware that I am present in all elements, be impartial and friendly to all, and adore everyone with hospitability and respect.”  

This does not mean that we should not worship Deity. Of course, we must worship Deity,
but at the same time, we must be aware that He is present in all elements.
We should love and respect every being. Otherwise, our puja is ‘lost labor’.   

So now, you see, we started out to love God, and we are committing a grave mistake right at the onset. It is indeed unfortunate! I love God – yet I envy and hate the ones in whom He resides! Does this not imply that I have not succeeded in loving Him? If someone asks us, “How much does this mango weigh?” – shall we weigh it after discarding its seed and peel? Similarly, whenever we consider God, we have to consider all living beings along with Him. 
“The one who knows Krishna’s swarup and three shaktis knows all about Krishna.” – (C.C.)  

We perform Love – sadhana. Will our love remain confined to just one kunja? Then it is a very narrow love indeed! But this is not true! When a single spark of this Love enters us,
we realize Love within each molecule, nay, each atom.
This Love is so magnificent that we should be careful not to minimize it. So the bard has sung –   

“O mind! You did not bow your head at every foot. Do you not realize the Treasure of your heart dwells amidst all? Bhagavan is in every being and He is the same. You puffed up and insulted others. O my foolish mind! Do you not know – your Priceless Beloved Krishna exists in so many forms? If you desire Him, if you have any wish to get Him, make everyone your own, beg at his or her feet and love all. If you cannot do it, your sadhana and bhajan are worthless. Consider yourself fallen; you will gain from it. You will get His lotus-feet, intoxicate your heart and beget prema. Otherwise you will only come and go (roam around in the cycle of birth and death) and never gain that priceless treasure called ‘Love’.”   

We simply cannot avoid this point in our sadhana. We shall love Bhagavan and not love our fellow men – then we can be sure that we shall never love Bhagavan. If we really love Bhagavan, we shall love His creation as well. I dislike or envy my fellow men and I say –
“I love Bhagavan”. Most definitely I am a liar!! On the other hand if I don’t serve Bhagavan and say – “Service to mankind is the topmost Dharma”, I am verily a cheater.

When we experience Him as the One present in all and all present in Him, then we are Bhagavad-bhaktas (God-lovers). Srimad Bhagavatam defines the best devotee as –
“sarva-bhuteshu yah pashyet bhagavad-bhavam-atmanah, bhutani bhagavatyatmanyesha bhagavatottama.”  

Meaning – “He who experiences Sri Bhagavan in every element and perceives all objects in Him is the best devotee.”   

Sri Gita agrees with the above statement –  “bahunan janmanan ante gyanavan mam prapadyate, vasudeva sarvam-iti sa mahatma sudurlabhah.”   

Meaning – “After many lifetimes a wise devotee realizes that ‘Vasudev is everything’.
Such a great soul is very rare.”  

There is nothing other than Him. Advay-gyan-tatva1 Sri Krishna is Swayam Bhagavan.
The more we realize it, the more we‘ll move away from hate and envy. We’ll relish Divine ras more and more. When we develop this bhav, all will appear nice and we will like everyone. We’ll go beyond good and bad, happiness and sorrow, and submerge in the ocean of Krishna-prem. Although lotus leaves touch the water, they never get wet.
Similarly, the good and bad, justice and injustice of this material world will not affect the sadhak any more.  

It is not as easy as we think. To bring this bhav in us we must always keep our conscience awake. Conscience is a very sharp weapon. In all our waking hours, we must constantly feel this bhav. When we move on the streets we should awaken this feeling in us –
“Sri Bhagavan exists in every element” and we should indiscriminately respect everyone.
If we ever see a fault in someone, we should think – “It is my mistake; when Sri Bhagavan exists in everybody, then how come I am superior to anyone? How dare I pick a fault in someone else?” We should evaluate ourselves constantly and correct ourselves.
We should be very careful that we do not lapse into faultfinding. We should practice such bhav daily. Then gradually this bhav will become dense.
(Sripad Binod Bihari das Babaji, Obstacles In Bhakti)