"It's quite highly possible that I have peaked. I mean, I just can't imagine what else I could do beyond this. It's really a bittersweet kind of feeling"

In this quote, Will Smith is expressing a sense of achievement and complete satisfaction with his present level of success. He thinks that he has actually reached the peak of his career and is unsure of what else he could possibly accomplish beyond this point. This awareness causes clashing emotions for Smith - on one hand, he takes pride in his achievements and the effort that has led him to this point, but on the other hand, he might feel a sense of sadness or fond memories for the journey that has actually now come to an end. Overall, this quote showcases Smith's humbleness and gratitude for his success, while also acknowledging the restrictions of human capacity.