I love you without knowing how, or when, or from where. I love you simply, without problems or pride: I love you in this way because I do not know any other way of loving but this, in which there is no I or you, so intimate that your hand upon my chest is my hand, so intimate that when I fall asleep your eyes close.

This quote is expressing the idea of unconditional love. This person loves the other without any need for reciprocation, without any requirements or hesitations. They are not trying to gain anything but simply to show their love. They express that the relationship between them is so close that when one of them falls asleep, the other’s eyes close as well. This kind of love is unconditional, pure, and without any boundaries.