increase your faith

Luke 17:5-6
[ Increase Our Faith ] The apostles said to the Lord, “Increase our faith!” And the Lord said, “If you had faith like a grain of mustard seed, you could say to this mulberry tree, ‘Be uprooted and planted in the sea’, and it would obey you.

The size of your faith is not as important as the object that you are putting your faith in. For example:

Imagine you're falling off a cliff, and sticking out of the cliff is a branch that is strong enough to hold you, but you don't know how strong it is. As you fall, you have just enough time to grab the branch. How much faith did you do you have to have in the branch for it to save you? Must you be totally sure it can save you? No, of course not. You only have two have enough faith to grab the branch. That's because it's not the quality of your faith that saves you; it is the object of the faith. It does not matter how you feel about the branch; all matters is the branch. And Jesus is the branch .
Timothy Keller (p55 Kings Cross)

The disciples were asking Jesus to increase their faith. Jesus can and will increase your faith but it’s not like a download in the matrix, it’s as a result of seeing Jesus more clearly. You will not Increase your faith by looking at your faith itself but by looking at Jesus, the author and perfecter of your faith.