A co-worker of mine leads a Bible study on Tuesdays at my place of work.
As we studied "the prodigal son" passage from Luke 15 it occurred to me that a person can do any number of “good” things WITHOUT Jesus.
They can save their marriage, quit smoking, lose weight, go to church, serve at a soup kitchen, donate toys, stay faithful to their wife, pay their debts, or help someone move and all of it without trusting in Jesus.
You need Jesus to do that which you cannot do: Live a holy life, absorb full the wrath of God, and be resurrected spotless after 3 days in the grave.
For all that can be accomplished WITHOUT Jesus, peace with God for salvation is only found by what Jesus has already done and our belief in Him as sufficient to save us.