'Possible' in the Bible

It is not possible for a good tree to give bad fruit, and a bad tree will not give good fruit.

And Jesus, looking at them, said, With men this is not possible; but with God all things are possible.

For there will come up false Christs, and false prophets, who will do great signs and wonders; so that if possible even the saints might be tricked.

And he went forward a little, and falling down on his face in prayer, he said, O my Father, if it is possible, let this cup go from me; but let not my pleasure, but yours be done.

Does it not seem possible to you that if I make request to my Father he will even now send me an army of angels?