"And his armor-bearer said to him, 'Do all that your mind inclines to; behold, I am with you, as is your mind so is mine" (1 Samuel 14:7 RSV).
How does this fit with John 14:13-14 and other New Testament verses about asking for blessings, faith, and believing that something is presently received?
John 14:13-14 (RSV) is this: "Whatever you ask in my name, I will do it, that the Father may be glorified in the Son; if you ask anything in my name, I will do it." I think comparing the two is a bit of a stretch, but let's see.
Jonathon, in a respite from battling the Philistines, has been guided to cross over to the enemy camp, in secret, taking only his armor-bearer with him. It's contrary to common sense, but it is his personal guidance. Here the armor-bearer urges him to trust that inner guidance, and he will support Jonathon's inner guidance. The message for us here is that trusting our own inner spiritual guidance is always the best path, even if others disagree—or even if our own 'common sense' tries to dissuade us.
John 14:13-14 is a teaching from Jesus as the Christ. He has just told his disciples that if they believe in the Christ as their own true spiritual identity, just as Jesus has recognized himself as expressing his own Christ Spirit, they "will also do the works that I do, and greater works than these will they do." So here 'the Son' is clearly synonymous with the Christ , and Jesus is speaking (as he often does in John) from his Christ Self. So I guess both verses urge us to trust our spiritual guidance; Jesus adds the promise that if we do, believing in the Christ we are, our faith will create according to our thoughts.