Are covalent bonds easily broken?

Definition of covalent bond:

1. Covalent bonds are formed by the mutual sharing of electrons between two atoms.
2. Example: $\mathrm{C}-\mathrm{C},\mathrm{C}-\mathrm{H},\mathrm{C}-\mathrm{O}$

Explanation:

1. Covalent bonds can be formed by end-to-end overlapping (sigma bond) and sidewise overlapping (pi bond).
2. Since we study covalent bonding in organic chemistry and organic compounds are very well known to exist in nature and thus are stable.
3. So, we can say that covalent bonds are stable.
4. Also we know that $\mathrm{C}-\mathrm{C}$ bond energy is approximately 83 kcal/mol which clearly indicates the high bond strength of covalent bonds.
5. Hence we can say that covalent bonds cannot be easily broken.