taste berry

In Africa there is a fruit called the 'taste berry,' so called because it changes a person's taste buds in such a way that everything eaten after it tastes sweet.

Giving thanks is the 'taste berry' of Christianity. When our hearts are full of gratitude, nothing that comes our way will be unpalatable to us. Those whose lifestyle is marked by thanksgiving will enjoy a sweetness of life unparalleled by any other.

Robert Strand, The Power of Thanksgiving