si no un sueño, ¿qué tienen que vivir una de
Semper Salta
Vives (singular); vivetis (plural)
Latin can express this a direct command using the imperative voice, or as a wish (i.e., "may you live forever") using the subjunctive mood. The latter is probably more idiomatic. In the imperative:...
"Viva tu Vida"-live your life