To quote the words of Swami Vivekananda,
An individual builds a family, a family builds a community, and a community builds a country.
Hence strong individuals, meaning people with values of love, compassion, respect and discipline build a strong country.
When there is righteousness in the heart, there is beauty in the character.
When there is beauty in the character, there is harmony in the home.
When there is harmony in the home, there is order in the nation.
When there is order in the nation, there is peace in the world.
The easiest means to show your love to your nation is through work. Your selfless work will convey the joy and depth of your love.
Whatever your work is, put your heart into it, it will not only make you happy but also makes the entire nation happy and prosperous.