Here is a George Bernard Shaw quotation that inspires my approach to preparing grant proposals:

Always find out rigidly and exactly what you mean, and never strike an attitude, whether national or moral or critical or anything else. […] Get all your facts right first: that is the foundation of all style, because style is the expression of yourself; and you cannot express yourself genuinely except on a basis of precise reality.
—Shaw, Bernard. Advice to a Young Critic: And Other Letters. Notes & Intro by E.J. West. New York: Capricorn Books, 1963.

At times, it can be tempting to write beautiful sentences; and they have their place.  But if forced to choose — and one is typically pressed for time in the grants game — it is preferable to chase down the facts about inputs, outputs and outcomes.  It is better to risk offering a dry sentence that answers the prospective funder’s question than a beautifully written evasion.