I love the following quotes. You can’t go wrong in terms of clean code as long as you’re aiming for simplicity. KISS your code !
Simplicity is the ultimate sophistication. Leonardo da Vinci
Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away. Antoine de Saint-Exupery
As a programmer, never underestimate your ability to come up with ridiculously complex solutions for simple problems. Thomas Fuchs
Programmers spend the first 5 years of their career mastering complexity, and the rest of their lives learning simplicity. Buzz Andersen