People only look at the words uttered, and not at the person who makes the statement. If you don’t consider the person who makes the statement, his words would be mere lip service. The speaker of Kalimah is one who seeks the truth, engages in study and then discovers God Almighty. This leads to a new emergence in his personality. His thinking and behaviour change. His life becomes dyed in the dye of God, even his words.
There is a saying of the Prophet: مَا مِنْ عَبْدٍ قَالَ: لاَ إِلَهَ إِلَّا اللَّهُ، ثُمَّ مَاتَ عَلَى ذَلِكَ إِلَّا دَخَلَ الجَنَّةَ (Sahih al-Bukhari 5827) If a person says, 'There I no god except God', and he dies with this conviction, then he will enter Paradise. But this is for not a person who pays lip service to these words. People only look at the words uttered, and not at the person who makes the statement. If you don’t consider the person who makes the statement, his words would be mere lip service. Here the speaker is one who seeks the truth, engages in study and then discovers God Almighty. This leads to a new emergence in his personality. His thinking and behaviour change. His life becomes dyed in the dye of God, even his words. We should not only look at the words spoken by a person, rather we must consider the speaker. The above hadith is not meant for those who pay lip service. Rather it tells us about a person whose entire personality has changed. Your words are a reflection of your changed personality. It is a manifestation of the new personality within you. Paradise is for such a personality.