Concept of Uns in Sufism refers to the selfless love of God. Sufis consider Uns for God as the shortest way to reach Him. This kind of love is similar to the love of a mother who loves her son with no self-interest of any kind, she does not look at his vices or his goodness, nor does she live on any hopes from him. Even if she has any expectations, which are belied, her love for the son does not become any less. It is possible that at times the mother may get annoyed with the son but it does not mean that her heart would not melt seeing him in any difficulty. In the same way, if one is capable of loving God in the same manner then there is no veil or barrier of any sort left in between. The only veil is that of self-interest, and if that is not there, all the distance is travelled and one reaches his destiny immediately.
Mahatma Ram Chandraji has stated in his book `Mazhab Aur Tahqiqat` on the basis of his personal experience that there have been such great persons, who in their lives never engaged themselves in any spiritual practices, no Jikr, no meditation, no contemplation, no worry of crossing spiritual stages, no desire of achieving salvation, peace or any such thing nor even to realise the Truth. It was only because of the intense love for their Master in their hearts and following his order to the hilt without caring for the result or their own interest in it, that they have become one with their Master. Mahatma Ram Chandraji has further stated that he would not have believed it if in his own case his experience was not something similar. He, however, has cautioned against exhibition of superficial love to cover up for ones lethargy, which would lead the seeker nowhere.
Thus the concept of Uns is one of the fundamental notions when trying to understand the love of God in Sufism. This kind of selflessness, when attained, is an all-encompassing feeling which paves the way for ultimate unity with God.