Seasonings are products of plant origin that are used to season food to highlight, reduce or changing its flavor.
The tradition of seasoning food is ancient, and various culturally have traded seasonings, such as Persians, Hindus, and the Chinese. The most popular non-vegetable seasoning is considered to be salt, which has a mineral origin.
It made his speech more sentimental and more powerful. To me Dr.King's speech is one of the most influential, stunning, and sentimental speeches I have heard.