John 7:17

Verse 17. If any man will do his will. Literally, if any man wills or is willing to do the will of God. If there is a disposition in anyone to do that will, though he should not be able perfectly to keep his commandments. To do the will of God is to obey his commandments; to yield our hearts and lives to his requirements. A disposition to do his will is a readiness to yield our intellects, our feelings, and all that we have entirely to him, to be governed according to his pleasure. He shall know. He shall have evidence, in the very attempt to do the will of God, of the truth of the doctrine. This evidence is internal, and to the individual it is satisfactory and conclusive.