Lambert described his side's 2-2 draw at Swansea as a huge point, despite seeing them denied all three by Danny Graham's injury-time equaliser.
He said: "It is a huge point although we should have seen it through.
"But it's a massive point and we were very good and threatening in the second half.
"In the first half they were coming at us from all angles and we had to weather that storm and we needed a couple of good saves from Brad and they also hit the woodwork.
"But to get the goal before half-time certainly helped us and it had a galvanising effect, it gives you something to get going and in the second half we were very good.
"We have been beaten heavily in the last three games so this is a huge point for the future of the club.
"The young lads in the side have been excellent and when you get beaten heavily you learn a lot about people and today showed they are mentally strong."