"Lord, Who Throughout These Forty Days" by Claudia Hernaman is one of the few non-Holy Week hymns in the United Methodist Hymnal that is explicitly Lenten. It's commonly sung on Ash Wednesday or the first Sunday during Lent, but it's appropriate for the whole season.
Lord, who throughout these forty days
For us didst fast and pray,
Teach us with Thee to mourn our sins
And close by Thee to stay.
The first verse of this hymn is probably my favorite, and "Teach us with Thee to mourn our sins" is without question my favorite line. The forty days of Lent mirror Christ's forty days in the wilderness, and so Lent should be for us a time of spiritual discipline as set forth in the Lord's example. Lent is a season of both penitence and reconciliation, and those require self-examination. But we don't observe Lent alone. It's not within our power to keep our Lenten disciplines alone! The point of Lent is our need for God's grace. Without God's grace we would not know what is sin, we would not be able to repent of sin, and we would not recognize in ourselves the image of God. We would not know God. Only by God's grace can we be cleansed, restored, and go on to perfect love.