What does Romans 4:24 mean?
Abraham's unwavering, rock solid faith in God to keep His promises was "counted to him" by God as righteousness. The words "counted to him" mean something like "credited to his account." In other words, Abraham's faith in God was the reason God declared Abraham justified and acceptable to Himself despite Abraham's sinfulness. Paul has stated, already, that righteousness cannot be earned, like a paycheck (Romans 3:23–24; 4:4–5). Nobody is good enough to deserve this redemption (Romans 3:20).Now Paul writes that the same thing can happen for us when we believe in God. For the first time, though, Paul gets more specific about what it is God wants us to believe. He is not asking us to believe that we will all have children when we are 100 years old, but He is asking us to believe Him. Specifically, God asks us to believe in Himself as the one who raised Jesus our Lord from the dead. He asks us to believe not just in the resurrection of Jesus, but that He, God, is the one who raised Him.
Paul expands on this thought in the following verse.