Here is the luminous teaching of our Savior: Thy will be done. (Matt. 6:10). Whoever sincerely pronounces this prayer leaves his own will and puts all things in the will of God. But the will inspired by the demons consists is self-justification and trust in ourselves, and then they easily subject a man who receives this sort of thought. (St. Barsanuphius the Great, Instructions, 40, 124)
It is a great good to be given over to the will of God. Then the Lord alone is in the soul, and no other thought, and she prays to God with a pure mind. When the soul is entirely given over to the will of God, then the Lord Himself begins to guide her, and the soul learns directly from God ... A proud man does not with to live according to the will of God. He likes to direct himself, and does not understand that man does not have enough understanding to direct himself without God. (St. Silouan the Athonite, Writings, VI.1).
In the measure to which a man cuts off and humbles his own will, he proceeds toward success. But insofar as he stubbornly guards his own will, so much does he brings harm to himself. (St. Ephraim the Syrian, Counsels to a Novice Monk)
How can you find out if you are living within the will of God? Here is the sign: If you are troubled about any thing, this means that you have not completely given yourself over to the will of God. A person who lives in the will of God is not concerned over anything. And if he needs anything, he gives both it and himself over to God. And if he does not receive the necessary thing, he remains calm nevertheless, as if he had it. The soul which has been given over to the will of God is afraid of nothing, not of thunder nor of thieves - nothing. But whatever happens, she says, "Thus it pleases God." If she is sick, she thinks: this means that I need to be sick, or else God would not have given it to me. Thus peace is preserved in both soul and body. (St. Silouan the Athonite, Writings, VI.4)
The Lord has given the Holy Spirit upon the earth, and in whomsoever He dwells, that one feels paradise within himself. You might say: why hasn't this happened to me? Because you have not given yourself over to the will of God, but you live according to yourself. Look at the one who loves his own will. He never has peace in himself and is always displeased with something. But whoever has given himself over to God's will perfectly has pure prayer. His soul loves the Lord, and everything is acceptable and good to him. (St. Silouan the Athonite, Writings, VI.14)