But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, — Galatians 5:22

Faith is listed among the fruit of the Spirit, which tells you it's a gift, not a human achievement. It's the work of God that you believe. Saving faith works through love, and without it you cannot please Him. So if you find yourself believing today, thank the Spirit who produced that fruit—you walk by faith, and every step is sustained by the same grace that started the journey.