Srimad Bhagavat Gita commentary chapter 18 verse 4-5

 Chapter 18 verse 4-5               

“Now hear my conclusion on the subject of renunciation, O tiger amongst men, for renunciation has been declared to be of three kinds. Actions based upon sacrifice, charity, and penance should never be abandoned; they must certainly be performed. Indeed, acts of sacrifice, charity, and penance are purifying even for those who are wise.” 

Bhagwan calls Arjuna tiger among men. He calls him that since he declares that only the truly brave person is about to perform actions without desire of particular results. These desire less actions are ultimate acts of bravery of the human spirit. As discussed in chapter 17, Bhagwan confirms that noble acts such as sacrifice, charity and penance should never be abandoned. These actions should however be done in a wise manner with pure intention in order to gain the appropriate merit.