If faith is confidence in what God has said, then a fair question follows. How do you get more of it?
Faith comes by hearing the word of God. The answer to thin faith is usually not to try harder, but to get back in front of the source.
Romans 10:17 gives a direct answer. So then faith comes by hearing, and hearing by the word of God.
That verse is doing something quietly practical. It locates the source. Faith is not primarily produced by effort, by intensity, or by wanting it badly enough. It is produced by exposure to what God has said.
Which means the answer to weak faith is usually not try harder. It is listen more.
This is why the reading habit and the faith question are the same question. A person who has spent a year in the Gospels has a different sense of what Jesus is like than someone who has spent a year hearing about him secondhand. Not because they are more disciplined, but because they have had more contact with the source.
Notice the tense as well. It says faith comes by hearing, present and continuing, not faith came by having heard once. This is ongoing intake, not a single deposit.
There is a practical version of this for hard seasons. When you can feel your confidence in God thinning, the instinct is to strategize, to talk it through, to read about the problem. Try instead going back to the text itself. Not a book about the Bible. The Bible. Read a Gospel straight through over a few days.
Something steadies. Not because you tried to believe, but because you were listening to the one whose voice produces faith in the first place.