The Supreme Lord Shri Krishna Explains the meaning of his words in the subsequent verses of the same Chapter.....
Shri Adi Shankaracharya Commentary on Bhagavad Gita translated by Swami Gambhirananda
File is in Epub version which you can open online using this
Instead of me giving you directly the answer, I would recommend you
yourself to read
the entire introduction to Chapter 5(which is a commentary itself
on verse 2) along with
Chapter 5, Verse 5 for a
Acharya Shankar has
given a really exhaustive, crystal clear answer for your question
through his BG commentary.
(A humble Advise to you would be to not read BG online as often it is incomplete without proper explanation of many verses.Instead Download commentaries written by bonafide acharyas of various sampradyas like Shri Adi Shankaracharya/Gita Bhasya by Shri Ramanujacharya.
Traditionally scriptures are meant to be read under proper guidance of a guru because incomplete knowledge of the non-dual Brahman can cause much more harm than benefit.Commentaries make it an easy task for us to read and understand scriptures in the proper sense as they were meant to be!)