I bought one of those Learn How to Play Guitar Chords By Yourself and it shows you the diagram where to put your hands and I took that in my room, sat with my singles and learned how to play guitar. ↗
By shading off, as I have done, the portion of the area of the diagram according to the individual age, every one may see how much of life is consumed, and what is left. ↗
This simple idea served to provide information on the geometrical shape of reacting molecules, and I was able to make the role of the frontier orbitals in chemical reactions more distinct through visualization, by drawing their diagrams. ↗
Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations. ↗