Romans 4:19 KJV — And being not weak in faith, he considered not his own body now dead, when he was about an hundred years old, neither yet the deadness of Sara’s womb:
Abraham didn’t focus on his inability to fulfill God’s promise to him.
Instead, he focused on God’s ability to fulfill the promises that God made.
Don’t look at what you don’t have. Believe God and magnify His ability and willingness to act on your behalf to bless you.