Primary metaphor
The kaf כ represents the Son of God. It emphasizes that he is both fully God and fully man by the long horizontals. He is the revelation resh ר who became flesh, as indicated by the rounded corner on the lower right. This chapter does not speak of the final kaf ך. Though the kaf כ and the final kaf ך are normally considered the same letter, they are not. The different form creates a different metaphor by the strokes. There is a reason they are different.
Kaf כ in 'that' or 'burning' kiy כי
Kiy as 'that' also means 'because, for, if, surely, except, yea, doubtless'. The word 'that' could often be replaced with 'surely' in the translations. God saw that it was good, has the additional weight of being 'surely good'.
On the surface it may be difficult to see how the word can mean both that and burning. Burning is a metaphor for totally devoted. It is similar to holy with the subtle difference. Holy is separate. Totally devoted is holy by choice and purpose. By the letters kiy כי is "the son of God (in the flesh) kaf כ before creation yod י. Even before creation, the Son of God was totally devoted to the plan of creation (including salvation). Because of his devotion, it is "because of him", and it will "surely and doubtlessly" come to pass.
kaf כ in 'so' ken כן
By the letters ken כן is 'the Son of God' kaf כ before 'the Son of Man in death' final nun ן. Moreso than in kiy כי, ken כן indicates the Son's commitment to the cross, not just the more generic 'plan of creation'.