Choosing Musa to go to Fir`awn and to be Soft and Gentle in His Invitation

Allah, the Exalted, says in His address to Musa that he had lived among the people of Madyan, avoiding Fir`awn and his chiefs. He worked as a shepherd for his father-in-law until the appointed time for his work ended. Then he met the decree of Allah and His predetermined will, without him having any set appointment. This entire situation was under the control of Allah, Blessed be He, the Most High. He compels His servants and His creatures to whatever end He wills. This is why Allah says,

ثُمَّ جِئْتَ عَلَى قَدَرٍ يمُوسَى

رَ‌بُّنَا الَّذِي أَعْطَىٰ كُلَّ شَيْءٍ خَلْقَهُ ثُمَّ هَدَىٰ

Our Lord is He who gave everything its shape, then guidance - 20:50.