See first that the design is wise and just: that ascertained, pursue it resolutely; do not for one repulse forego the purpose that you resolved to effect. - William Shakespeare
The general rule of law is, that the noblest of human productions -- knowledge, truths ascertained, conceptions, and ideas -- become, after voluntary communication to others, free as the air to common use."~ - Louis D. Brandeis
The living limit is not ascertained by wealth one has - Duncan Tallam
Two things, well considered, would prevent many quarrels; first to have it well ascertained whether we are not disputing about terms rather than things; and secondly, to examine whether that on which we differ in worth contending about.