Grove presents time as a limited resource that must be allocated deliberately. Every commitment consumes time that cannot be used elsewhere, so agreeing to one task, meeting or responsibility also involves giving up other possible uses of that time. The point is not simply to avoid excessive commitments, but to recognise that choices always involve trade-offs.

In a management context, this principle encourages people to judge opportunities by their relative importance rather than considering each request in isolation. A worthwhile activity may still deserve to be declined if another use of the same time would contribute more to an important objective. The quote therefore connects time management with prioritisation and decision-making. It suggests that effective use of time depends partly on deciding what not to do, making the cost of each commitment visible and directing attention towards work judged to have greater value or significance.