Right before success you face your worst opposition. Look at the Lord Jesus, He was facing death by on a cruel Roman cross, but resurrection is coming in 3 days. His resurrection makes the way for all sinners to receive eternal life, just as He promised. Now we can believe in Him for eternal life.
So don’t be down and don’t be low, hope is coming. People who invent things spend a lot of time in the drudgery of details until success comes.