Question about strength

Hello guys.I have question regarding strength.I am new to bodybuilding(started on May 15th 2014).When i started lifting,i did benchpress with 40kg,4 sets/10 reps,and now i went to 140 kg/4 sets/10 reps.So my question is:is there a limit of strength?

P.S. I weight 80-82 kg

Question about strength