From the writings of St. Paul of the Cross –
Afflicting yourself with penances is not what God is asking you. Accept the crosses which God permits day by day. Oh, what great value lies in such penances.
From the Passionist Constitutions No. 57 –
We can manifest our conformity with Christ Crucified in our lives – through our readiness to spend ourselves and to be spent in apostolic labours; through our acceptance of the burdens inherent in the common life; through our patience in coping with human weaknesses in ourselves and in others; through our sharing in the lot of the poor.