Gratitude for the heart is done by acknowledging and believing if all the blessings that we feel are solely from God and we as humans only become intermediaries so that everything can happen at His will. With gratitude in our hearts, we will feel the sincerity of the blessings that God has given both the blessings of faith, faith and Islam throughout life.
A servant who is grateful, then the oral will always be used for dhikr and say Alhamdulillah which is done as a form of praise for the blessings given by God. In addition, talking about the blessings that God gives to others is also a form of gratitude and acknowledgment to God. This is all done not to boast and cause envy for others. Then, being grateful for oral is not Riya's actions, because there is no argument that states that giving thanks orally is Riya.
Being grateful for members of the body is doing a lot of obedience to God and not using limbs for the purpose of disobedience. The eyes are only used to see good things, the ears are only used to listen to the beneficial and other members of the body are only used to worship God while at the same time carrying out matters that have been required by God.