You gained access into grace by faith. Faith gave you that access.

What does Romans 5:1b-2 tell you? It says you gained access into this grace. And you gained access into this grace by faith. Faith gave you that access.

(Quote from https://realreality.org/downloads/how-god-will-transform-you/)

Faith allowed grace to take hold of you. Faith is the key that opened your door to grace. You stand in this grace. You couldn’t stand without this grace. Grace causes you to stand in Christ and to walk in His righteousness. Only by grace are you able to stand. Only by grace are you able to walk in God’s will.

You need God’s grace, but you can only receive God’s grace one way. Through Jesus Christ, you have gained access, by faith, into this grace. (Romans 5:2) Once you receive God’s faith by hearing His Word (The Father’s Utterance is Jesus Christ), God gives you His grace through faith. (Ephesians 2:8) Then, you advance to the works grace does since “faith without works is dead.” (James 2:17)