Since our bodies house our voices, good posture becomes an important prerequisite for the best use of our vocal instruments.
Christianity Today (2000)
The most important prerequisite for economic survival is flexibility.
Dyson, Freeman Infinite in All Directions (1989)
This is an important prerequisite for proper fasting and the best guarantee of success.
Lutzner, Dr Helmut Successful Fasting -the easy way to cleanse your body of its poisons (1990)