Syntax: The structure 'You say I know...' introduces reported speech or a thought the listener is having. 'it's a waste of time' is a noun clause acting as the object of 'know'. 'There's no use trying' uses the gerund 'trying' as the subject of the existential clause 'There's no use'.
Morphology: 'Waste' is a noun here. 'Trying' is the present participle/gerund form of the verb 'to try', functioning as a noun in the phrase 'no use trying'.

Syntax: 'So scared that...' is an adjective phrase describing the subject ('you' is implied). 'life's gonna pass you by' is a subordinate clause explaining the fear. 'Your spirit dying' is a noun phrase in apposition, describing the state of the listener.
Morphology: 'Scared' is the past participle of 'scare', used as an adjective. 'Gonna' is a colloquial contraction of 'going to', indicating future tense. 'Dying' is the present participle of 'die', used as an adjective describing 'spirit'.

Syntax: 'Not long ago' is a time adverbial. 'I could feel...' is a main clause in the past tense. 'What was so clear' is a nominal relative clause acting as the subject of 'is now overcast'. 'With mixed emotions' is a prepositional phrase describing how things are overcast.
Morphology: 'Could' is the past tense of the modal verb 'can', indicating past ability. 'Overcast' is typically an adjective for weather, here used as a past participle in a passive construction ('is overcast').

Syntax: 'Deep in your heart is the answer' uses inversion for emphasis; the typical order would be 'The answer is deep in your heart'. 'Find it' is an imperative sentence. 'I know it will pull you through' has 'I know' as the main clause, followed by the noun clause 'it will pull you through' as the object.
Morphology: 'Pull through' is a phrasal verb. 'Will' is a modal verb indicating future certainty.

Syntax: 'Get on your feet' and 'Get up' are imperative sentences (commands). 'and make it happen' is a coordinate clause joined by 'and' to the imperative 'Get up'. 'Stand up and take some action' follows the same imperative + coordinate clause structure.
Morphology: 'Get' and 'Stand' are base form verbs used for the imperative mood. 'Happen' is a bare infinitive after the causative verb 'make'.

Syntax: 'That we've all been through' is a relative clause modifying the pronoun 'it' from the previous line ('I think it's true that...'). 'Some nasty weather' is the object of the preposition 'through'.
Morphology: 'We've' is a contraction of 'we have'. 'Been' is the past participle of 'be', used with 'have' to form the present perfect tense 'have been'. 'Weather' is repeated for emphasis, a rhetorical device called epizeuxis.

Syntax: 'Let's understand' is a first-person plural imperative (a suggestion) using 'let's' (contraction of 'let us'). 'that we're here to handle things together' is a noun clause acting as the object of 'understand'.
Morphology: 'Let's' is a fixed contraction. 'We're' is a contraction of 'we are'. 'To handle' is the infinitive form expressing purpose.

Syntax: 'Don't stop' is a negative imperative. 'before it's over' is an adverbial clause of time. 'The weight is off your shoulder' is a declarative sentence using the metaphor of a lifted burden.
Morphology: 'Don't' is the contraction of 'do not'. 'It's' is the contraction of 'it is'. 'Off' is a preposition here. 'Shoulder' is singular, often used idiomatically in this phrase even though weight might be on both shoulders.