'Willing' in the Bible

And a leper came to him, entreating him and kneeling down, saying to him, "If you are willing, you are able to make me clean."

And becoming angry, he stretched out his hand [and] touched [him], and said to him, "I am willing; be made clean."

Stay awake and pray that you will not enter into temptation. The spirit [is] willing, but the flesh [is] weak!"