The first thing that should have been noted while reading this was the way that God shows how to pursue holiness. Interestingly, He shows it by showing what not to do. Romans 12 reflects this by showing how to renew the mind and not to be transformed to this world. Psalm 1 shows how to accomplish this.
Thoughts are defined as "an intention or a hope of doing something," according to Oxford Dictionary. The Biblical definition is found first in the Old Testament and then in the New Testament. The word used in the Old Testament is "machashebheth," from the verb "chashabh," meaning "to think."