Novena to Saint Jude

I am to begin a 9-day Novena to Saint Jude. One should never presume, but I hope for an answer to praying to one of Heaven's most reliable and trustworthy Saints. I suppose they're all trustworthy really, mirroring, as they do, the Good God. However, I remain an unreliable and unworthy sinner, a lost cause of the Church so to speak, and hope for mercy and Grace.