... there is no such thing as peace of mind

there is no such thing as peace of mind. Mindmeans disturbance; restlessness itself is mind. Yoga is not an attribute of the mind, nor is it a stateof mind. (...)
M: Don't you see the contradiction? For many years you sought your peace of mind. You could not find it, for a thing essentially restless cannot be at peace.
Q: There is some improvement.
M: The peace you claim to have found is very brittle any little thing can crack it. What you call peace is only absence of disturbance. It is hardly worth the name. The real peace cannot be disturbed. Can you claim a peace of mind that is unassailable?
Q: l am striving.
M: Striving too is a form of restlessness.
Q: So what remains?
M: The self does not need to be put to rest. It is peace itself, not at peace. Only the mind is restless. All it knows is restlessness, with its many modes and grades. The pleasant are considered superior and the painful are discounted. What we call progress is merely a change over from the unpleasant to the pleasant. But changes by themselves cannot bring us to the changeless, for whatever has a beginning must have an end. The real does not begin; it only reveals itself as
beginningless and endless, all-pervading, all-powerful, immovable prime mover, timelessly changeless.