Knowledge means to know matter and spirit and the controller of both. – BG 2.11p
“Those who are on this path are resolute in purpose, and their aim is one. The intelligence of those who are irresolute is many-branched.” – BG 2.41
The resolute purpose of a person in spiritual life is based on knowledge of the soul beyond the conception of the body – not theoretically but practically, when there is no longer a chance for sense gratification manifested in fruitive activities. One who is not firmly fixed in mind is diverted by various types of fruitive acts.
“The place of action [the body], the performer, the various senses, the many different kinds of endeavor, and ultimately the Supersoul—these are the five factors of action.” – BG 18.14
The instruments of action are the senses, and by the senses the soul acts in various ways. For each and every action there is a different endeavor. But all one’s activities depend on the will of the Supersoul, who is seated within the heart as a friend.
So, we are responsible for our good or bad actions.
Religion without philosophy is sentiment, or sometimes fanaticism, while philosophy without religion is mental speculation. – BG 3.3