Kindness and gentleness are traits that are inherently good, and whoever has them has been given his portion of goodness.  The Messenger of Allah, peace and blessings be upon him, said: مَنْ يُحْرَمْ الرِّفْقَ يُحْرَمْ الْخَيْرَ He who is deprived of kindness is deprived of goodness.  Make sure you have the intentions before giving dawah. You should have pure and good intentions. Oftentimes, many Muslims decide to tell the world about Islam but do it in a way that causes more damage than good, putting themselves in unfortunate situations Don't give Dawah if your intention is to show off that you are a very knowledgeable person; make sure your intention is to please Allah. Giving Dawah is essentially a special mission to invite people to worship Allah according to the way that He wants to be worshiped. You are delivering a message of truth and showing others how to follow it.