Courage in Preaching

كِتَـٰبٌ أُنزِلَ إِلَيْكَ فَلَا يَكُن فِى صَدْرِكَ حَرَجٌ مِّنْهُ لِتُنذِرَ بِهِۦ وَذِكْرَىٰ لِلْمُؤْمِنِينَ

[This is] a Book revealed to you, [O Muḥammad] - so let there not be in your breast distress therefrom - that you may warn thereby and as a reminder to the believers.

فَأْتِيَا فِرْعَوْنَ فَقُولَآ إِنَّا رَسُولُ رَبِّ ٱلْعَـٰلَمِينَ

Go to Pharaoh and say, 'We are the messengers of the Lord of the worlds,