Should be "ad astras per asperis" if you want it to mean that. Hem, it should be: "Per aspera, ad astra"... Anyway "Timeo Danaos et dona ferentes", that litterally means "i fear the greeks, especially when they bring presents for me", wich means: when someone comes to you with an unexpected present, think that there should be something behind... Repetita iuvant, it helps to repeat things already said.