A common phrase is "I can't tell you how much I X", or "Words can't express how much I X" as a way of expressing the speaker's significant feelings towards X.
This phrase implies that the speaker feels that language cannot do their feelings justice. There should be a simpler way of conveying this concept, instead of saying "I can't express myself."
Is there a word that describes the situation when the speaker cannot adequately express their feelings, except by noting that they cannot adequately express their feelings? The closest word I can think of is "ineffable," however, "ineffable" fails to capture the concept that the only way to express the speaker's feelings (or their extent) is by stating their ineffability.
Example usage in a sentence:
Person A: "You saved my life. My gratitude is xxxxx"