Ask for what will suffice you. Speak with the voice of Philip: "Lord, show us the Father, and it is enough for us" (Jn 14:8). The Lord says to you: "Have I been with you so long, and yet you do not know Me, Philip? He who has seen Me has seen the Father" (Jn 14:9).
Therefore give praise to Christ, who became man for you in your weakness. Prepare your throat, that you may quench your thirst with the divinity of Christ.
"Until now," He said, "you have asked nothing in My name. Ask, and you will receive, that your joy may be full." The joy He calls full is understood to be not carnal, but spiritual joy. When it becomes such that nothing can be added to it, then precisely it will be full.
Everything we ask that pertains to the attainment of this joy must be asked in Christ's name. This is so if we have some understanding of divine grace, and if we truly thirst for the blessed life.
To ask for anything else is to ask for nothing. Not because it does not exist at all, but because everything else we thirst for is nothing in comparison with what pertains to the attainment of perfect joy.
For man himself is certainly nothing, of whom the Apostle says: "If anyone thinks himself to be something, when he is nothing..." (Gal 6:3). In comparison with the spiritual man, who knows that by the grace of God he is what he is, everyone who is self-confident in his vanity is nothing.
Therefore the words, "Truly, truly, I say to you: if you ask anything of the Father in My name, He will give it to you" (Jn 16:23), may be rightly understood in this way. The phrase "if anything" should not be taken as "whatever at all," but as "something that is not nothing in comparison with the blessed life."
What follows, "Until now you have asked nothing in My name. Ask, and you will receive, that your joy may be full," may be understood in two ways. Either: "You have not asked in My name, because you have not known this name as it should be known." Or: "You have asked nothing, because in comparison with what you ought to have asked, what you asked must be counted as nothing."
Therefore, so that in His name we might ask not for "nothing," but for full joy, He urges us with the words: "Ask, and you will receive. That your joy may be full." That is: "Ask in My name that your joy may be full, and then you will receive." For divine mercy will never deceive His saints in the acquisition of this good.