Much of God's grace is conditional.

God gives a lot of His grace once people meet His conditions. Many live with little grace, because they will not meet God's conditions. They do not see God doing much in their lives, because He is not doing much in their lives.

An example.

Matthew 7:11 KJV

[11] If ye then, being evil, know how to give good gifts unto your children, how much more shall your Father which is in heaven give good things to them that ask him?

Many good things are waiting for you, but you must ask your Father for them, in order to get them.

Often, in churches, people are sick and would love for God to heal them immediately and miraculously, but they never ask for that.