The Word of God has given us precious promises to speak over our lives. You will have and experience the things you say and believe (Mark 11:22-24). You say it until you believe it, then you say it because you believe it.
Hebrews 13:5-6 Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee.
So that we may boldly say, The Lord is my helper, and I will not fear what man shall do unto me.
Psalm 107:2 Let the redeemed of the LORD say so, whom he hath redeemed from the hand of the enemy;
Romans 8:31 What shall we then say to these things? If God be for us, who can be against us?