Our intellectual powers are rather geared to master static relations and that our powers to visualize processes evolving in time are relatively poorly developed. For that reason we should do (as wise programmers aware of our limitations) our utmost to shorten the conceptual gap between the static program and the dynamic process, to make the correspondence between the program (spread out in text space) and the process (spread out in time) as trivial as possible.

Dijkstra (1968) "A Case against the GO TO Statement" cited in: Bill Curtis (1981) Tutorial, human factors in software development. p. 109.