Parashat Ki Tavo contains part of the Tokhekha (the Rebuke and warning of retribution of Bnei Yisrael do not keep the Torah). We also read of the blessings and curses at Mount Gerizim and Eival. Though mitzvot come with potential for reward, there is also the idea of punishment. The rebuke and recital of the curses at Mount Eival remind us that the covenant demands commitment - through easy and through difficult times.