His divine power has given us everything needed for life and godliness, through the knowledge of him who called us by his own glory and goodness. Thus he has given us, through these things, his precious and very great promises, so that through them you may escape from the corruption that is in the world because of lust, and may become participants of the divine nature. For this very reason, you must make every effort to support your faith with goodness, and goodness with knowledge, and knowledge with self-control, and self-control with endurance, and endurance with godliness, and godliness with mutual affection, and mutual affection with love. For if these things are yours and are increasing among you, they keep you from being ineffective and unfruitful in the knowledge of our Lord Jesus Christ. For anyone who lacks these things is nearsighted and blind, and is forgetful of the cleansing of past sins. (2 Peter 1:3-9, NRSV)
We need to support our faith, through the many wonderful gifts God has given us.
And in supporting our faith we will mutually help those who are a part of the body to uphold their faith. When our faith increases it affects the faith of the body of believers around us.
So build up your faith to help the body of believers build their faith.