'Except for He who created me,' meaning: but I worship the One who created me, i.e., brought me into existence. 'For indeed, He will guide me,' meaning: He will reward me for my faith.
﴿إِلَا الَّذِي فَطَرَنِي﴾ لَكِن أعبد الَّذِي فطرني: خلقني ﴿فَإِنَّهُ سَيَهْدِينِ﴾ أَي: يثيبني على الْإِيمَان.