Nothing is more difficult than prayer. In all other tasks of spiritual life, however exacting, one can sometimes rest, but there is no rest in prayer, up to the end of one's life.
The notion of silence appears to unsettle—or puzzle—no small number of people of all walks of life...Something as "unproductive" as silence is not often taken seriously. The evaluation of silence differs from culture to culture. In the West, if you notice that someone is silent for a prolonged period of time, the tendency might be to ask, "are you all right?" Or the silence might be interpreted as a sign of unbalanced introversion or isolation or passive aggression. In India, they would say of the silent one, Ah muni! (Ah, there is a holy soul!)