A fallen phrase puzzle is a bit like Sudoku with words.
To complete the puzzle, fill in the letters in the column they fall under.
Start with the one letter columns because they clearly don't have anywhere else to go.
(The easiest one is done for you.) Then try different combinations to fill in common
one-, two- and three-letter words. Mark off the letters in the columns as you go.
The more you fill in, the easier it is to guess which letter is next.
The solution is a quote by multiple gold-winning Olympic great, Michael Phelps.