Whatever happens, I will not let my cheerfulness be disturbed. Being unhappy won't get me anywhere and will dissipate all my goodness. Why be unhappy about something if you can change it? And if you can't, how will being unhappy help?
ShantidevaWhile others are engaged in inferior and menial tasks in which they encounter many difficulties, how can I sit here at peace and do nothing? I must and shall benefit them, but without ever succumbing to the poison of self-importance.
ShantidevaMy body, thus, and all my good besides, And all my merits gained and to be gained, I give them all away withholding nothing To bring about the benefit of beings.
ShantidevaAll the harm, fear, and suffering in the world are caused by attachment to the self: Why should I hold on to this great demon?
Shantideva