The Gospel is deadly serious. God has spoken clearly of His Son, and His testimony is perfectly contained in the Bible. All people are obligated to believe and obey what the Word of God says.
And Jesus Himself makes our obedience and faith the primary test of our relationship with Him: "If you love Me, you will keep My commandments . . . whoever has My commandments and keeps them, it is he who loves Me." (John 14:15, 21).
What you did for God yesterday doesn't matter. Today matters. The question is not, what I've done in the past, but whether I trust Jesus today, and obey Him today. Loving Him today means trusting and obeying Him today.
This is a test of our faith, one we face daily.