The quality of mercy is not strained ...
The same applies to compassion, and forgiveness.
Nobody needs pity but rather empathy.
This comes to us from Jesus in the writings of Shakespeare.
Jesus demonstrated these as part of his Kingdom of God. Everybody is invited to love God and all others and become part of the Kingdom including sinners. Jesus was also a healer. Using God's unstrained mercy, compassion, and forgiveness to heal them.