Why don´t we trust in His will?

"We pray, we ask, and the Divine is not deaf. The Divine always hears the prayer of everybody. If He can hear even the small anklets on the feet of an ant, of course, He can hear our prayer also. But very often we expect, if we pray, that we have to have it very quickly. We are not patient. But the Lord has created us. He knows what is best for us, no? So, why don´t we trust Him? Why don`t we trust in His will?"