WHOLE CHARACTER
态tài
a state; a condition; a form; attitude; manner; (grammar) voice
态 puts 太 (the exact sound tài) over a heart: states and manners — 态度, 状态, 姿态.
ZDIC marks 态 as 形声 (the header string reads 从太、心声): in the simplified shape 太 is the sound side and 心 the heart side.
TOP: THE SOUND SIDE 太 (TÀI)
太tài
excessive; too; very
A standalone character (tài, too; very); when a character keeps it as a piece, the sound role is stated on that character's page.
In 态: top: the sound side 太 (tài) The whole syllable tài matches exactly.
BOTTOM: THE HEART — INNER STATES AND ATTITUDES
心xīn
heart; mind
Mind/feeling clue.
In 态: bottom: the heart — inner states and attitudes Shown with its documented or clearly limited role.