As long as there is unrest in mind track of peace can not be attained and many factors which influence the peace of mind which all relates to mundane existence.
There are so many chapters which could make impact on the subject but realization is the pillar and the post. Contentment is the next to help on subject as per the quotes of saints. It is contentment which appears as royal road to wisdom of peace and bliss. Though life relates to wish and will hence the subject can not be adore in full but by maximizing it one can achieve the motto.
Two other thinks also impact hard as main which can bring the unrest to a stable chord one is chanting the name with faith and other is yoga and meditation.
And both could only be proved fruitful with blessings of true saints.
May lord bless all.
Thanks please.

