Gauge Theories in Particle Physics: A Practical Introduction, Volume 2: Non-Abelian Gauge Theories: QCD and The Electroweak Theory, Fourth Edition

“ Be like the sun for grace and mercy. Be like the night to cover others' faults. Be like running water for generosity. Be like death for rage and anger. Be like the Earth for modesty. Appear as you are. Be as you appear. ” ― Rumi