Worcester outscored the home side with a penalty try and score from Tom Wood, but were left to count the cost of indiscipline as Glen Jackson kicked six penalties.
Warriors next travel to Bath Rugby next weekend and Ruddock is convinced his team can remain confident after taking the positives out of defeat in London.
"If we can keep that attacking intent and reduce the penalties we will win games - it is as simple as that," said Ruddock.
"As disappointed as I am to lose, I am very encouraged by what I saw today and last week. If we keep on playing that way we won't be far away.
"There are nine games to go and we have gone to places like London Irish and drawn, beat them last week, drew with Saracens at home and only just lost away.
"We know we can play against the best teams in the league, we have been unlucky to draw and lose at times. We know we are not far off these teams - our challenge is to get better."
Worcester could have snatched a dramatic late win at Wembley with a lineout just five minutes from the Saracens.
But the home side turned over possession and a late penalty from Jackson just pulled up short as Warriors took a losing bonus point.
"We got turned over and it was good play by Saracens at the end. But I would back us to dominate those nine times out of ten. Saracens had a lead and that helps your motivation to defend," said Ruddock.
"Throughout the game I was never biting my finger nails in the stand thinking we are in trouble. We were in control of the game, played good rugby, were on top and scored two tries.
"At times we gave away too many penalties, but other ways I thought our performance was very good."










