Please capitalize where necessary: when the sun is shining and you need to cool down the tempting lake is just a short walk away with its fresh and clean water to swim in.
A: When the sun is shining and you need to cool down the tempting lake is just a short walk away with its fresh and clean water to swim in.

Please capitalize where necessary: this included parties extending from the religious right to secular parties of the political center.
A: This included parties extending from the religious right to secular parties of the political center.

Please capitalize where necessary: please join lighted beings throughout the universe in sending forth prayers for the highest good of all.
A: Please join lighted beings throughout the universe in sending forth prayers for the highest good of all.

Please capitalize where necessary: at nighttime you see glimpses of the great battles this valorous sword still remembers.
A:
At nighttime you see glimpses of the great battles this valorous sword still remembers.