We are joining with millions of Christians all over the world by observing the season of Lent. And one of the historical purposes of Lent is to come before God and ask him to purify our hearts.
There's a beautiful prayer in Psalm 139 that says this:
23 Search me, God, and know my heart;
test me and know my anxious thoughts.
24 See if there is any offensive way in me,
and lead me in the way everlasting.
So Lent is a time to pray that prayer-to humbly ask God to reveal anything offensive in us, so that we can make a 180-degree turn away from that, toward God. It's a season of prayerful self-reflection, and confession, and repentance.