Mardi Gras: "your passions ... make war within your members"

So submit yourselves to God. Resist the Devil, and he will flee from you. Draw near to God, and he will draw near to you.

-- Jas 4:1-10

The seasons and days of penance in the course of the liturgical year (Lent, and each Friday in memory of the death of the Lord) are intense moments of the Church's penitential practice. These times are particularly appropriate for spiritual exercises, penitential liturgies, pilgrimages as signs of penance, voluntary self-denial such as fasting and almsgiving, and fraternal sharing (charitable and missionary works).

-- CCC 1438