Conversion and repentance are the necessary conditions of Divine Mercy.
Talking about God's Mercy, about God's love and compassion, we forget that God is HOLY and He cannot accept anything which is not holy. Jesus says: "Be holy as your Father in Heaven is holy."
We forget that the necessary condition of God's forgiveness and mercy is repentance and conversion and not the whimsy, capricious tolerance of sin and perversity... All the words like: "God is accepting us where we are and as we are" are only a delusion and -simply saying- a lie. Read please all places where Christ is forgiving the sin, and you will see that in all these places He is requiring conversion and repentance. So it is not true that He is accepting us "where we are". He cannot accept us if we are in the situation of sin and moral disorder. His very reason of Incarnation, the only one reason and the only one purpose is to liberate us from the sin! He is not leading the 99 sheep to the one who is lost, He is bringing the one who is lost to the 99, who didn't get lost.
"Now there were some present at that time who told Jesus about the Galileans whose blood Pilate had mixed with their sacrifices. Jesus answered, "Do you think that these Galileans were worse sinners than all the other Galileans because they suffered this way? I tell you, no! But unless you repent, you too will all perish. Or those eighteen who died when the tower in Siloam fell on them—do you think they were more guilty than all the others living in Jerusalem? I tell you, no! But unless you repent, you too will all perish." (Luk 13:1-5)