If possible, it is usually placed at the beginning of a paragraph to make it more eye-catching.

As... (name) said: "..." and then analyze its meaning

Or write the sentence "..." first and then "This is..." (Name) once said, "It's best to analyze it later."

You can also put it in the middle of the paragraph. It just depends on the importance of this sentence. If it is more important, put it at the beginning of the paragraph...

I wish you good luck in your studies!