Treviso pipped their Italian rivals Zebre by a single point after a 20-19 defeat to Newport Gwent Dragons, claiming the losing bonus point needed to sneak into 11thspot.
That came after a difficult few weeks in which they have been struggling with injuries, having not picked up any points on the road since January.
However with the European qualification in the bag, Goosen is optimistic that the club can learn from their recent struggles before next season.
He said: "Our main objective was to get into the Champions Cup, and we've managed to do that. But naturally we also wanted to win, we were capable of doing so and we came very close.
"In the first half [against the Dragons], with a strong wind behind us, we didn't take advantage of three chances to score. After the break it was a real fight.
"I have to point out that at one point in the second half, all of our starting back row were off, in the last eight minutes we had [Alberto] Sgarbi and [Matteo] Pratichetti there with [Dean] Budd, it's not easy to in an emergency like that.
"However it went, we can now look forward, and hopefully with some hope. I'm telling the truth when I say it's been the hardest four months of my life. But it's good like that, I've learned so much because it's when you are suffering that you learn the most, it will be an important experience for my coaching future.
"I think back to the Six Nations when we didn't have the players, or to all the injuries which tested us in the last few weeks. Let's just say I've learned to deal with certain situations and how to work with the squad and always be positive. To avoid making the players feel like they are overcoming difficulties but rather giving them hope."
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